After finally committing to a public bootloader unlocker, HTC has been pretty diligent about increasing the number of supported devices. Today the company added a number of handsets, including the Desire HD. Variations of the Desire and Wildfire are also now on the supported list, bringing the total to more than 40. And even if your device isn't on the official list, the Unlock Bootloader tool works with many other phones.
HTC's bootloader unlocker database updated with Desire HD, Wildfire, and many others
HTC updates its Unlock Bootloader tool to include a number of new phones, including the Desire HD and Wildfire.